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Method for manufacturing thermoplastic resin composition

a technology of thermoplastic resin and composition, which is applied in the field of thermoplastic resin composition manufacturing, can solve the problems of large dangers of strong acidic solution, large load on the environment, and eroded three-dimensional objects in the precursor of three-dimensional objects, and achieves the effects of reducing the use of polyester resin, and reducing the risk of toxicity

Active Publication Date: 2021-03-25
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent is related to a method for manufacturing a three-dimensional object using a fused deposition modeling system. The method involves using a soluble material for three-dimensional modeling that has a specific glass transition temperature and a specific diameter of the filament. The soluble material can be made from a thermoplastic resin and a plasticizer, fillers, compatibilizers, elastomers, and other components. The manufacturing process involves kneading the raw materials, and the filament is preferably made through a drawing process. The three-dimensional object can be obtained by removing the support material from the precursor with neutral water. The method can suppress the degradation of the modeling accuracy of the three-dimensional object and has a high rate of dissolution to neutral water.

Problems solved by technology

However, this aqueous strong alkaline solution is large in danger for people and in load onto the environment.
Moreover, when a precursor of the three-dimensional object is immersed in the aqueous strong alkaline solution for a long term, the three-dimensional object in the precursor of the three-dimensional object tends to be eroded by the alkali.
Thus, restrictions have been given to the use of any polyester resin, such as polylactic acid (PLA), which is low in resistance against alkalines, as a raw material of the three-dimensional object.
Consequently, the precision (In the present specification, dimensional precision is also referred to simply as “precision”) of the resultant three-dimensional object is remarkably damaged.

Method used

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  • Method for manufacturing thermoplastic resin composition
  • Method for manufacturing thermoplastic resin composition
  • Method for manufacturing thermoplastic resin composition

Examples

Experimental program
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Effect test

example 1

[0254]In a 2-L stainless steel separable flask (equipped with a K-tube, a stirrer, and a nitrogen introducing tube) were prepared 97.7 g of dimethyl 2,6-naphthalenedicarboxylate (manufactured by Tokyo Chemical Industry Co., Ltd., first grade), 40.6 g of sodium dimethyl 5-sulfoisophthalate (manufactured by Wako Pure Chemical Industries, Ltd.), 76.7 g of ethylene glycol (manufactured by Wako Pure Chemical Industries, Ltd., special grade), 82 mg of titanium tetrabutoxide (manufactured by Tokyo Chemical Industry Co., Ltd., first grade), and 506 mg of sodium acetate (manufactured by Wako Pure Chemical Industries, Ltd., special grade). Then, the mixture was heated by a mantle heater, with the outside temperature increased from 140° C. to 260° C. over 1 hour, under stirring at normal pressure under a nitrogen atmosphere, and was stirred at that temperature for 6.5 hours to undergo a transesterification reaction. Thereafter, 6.89 g of tetrabutylphosphonium dodecylbenzenesulfonate (manufactu...

example 2

[0256]In a 2-L stainless steel separable flask (equipped with a K-tube, a stirrer, and a nitrogen introducing tube) were prepared 23.7 g of dimethyl 2,6-naphthalenedicarboxylate (manufactured by Tokyo Chemical Industry Co., Ltd., first grade), 52.1 g of sodium dimethyl 5-sulfoisophthalate (manufactured by Wako Pure Chemical Industries, Ltd.), 22.4 g of ethylene glycol (manufactured by Wako Pure Chemical Industries, Ltd., special grade), 26 mg of titanium tetrabutoxide (manufactured by Tokyo Chemical Industry Co., Ltd., first grade), 117.3 g of bisphenoxyethanolfluorene (manufactured by Osaka Gas Chemicals Co., Ltd.), and 866 mg of sodium acetate (manufactured by Wako Pure Chemical Industries, Ltd., special grade). Then, the mixture was heated by a mantle heater, with the outside temperature increased from 180° C. to 260° C. over 1 hour and 10 minutes, under stirring at normal pressure under a nitrogen atmosphere, and was stirred at that temperature for 4 hours and 20 minutes to unde...

example 3

[0257]In a 2-L stainless steel separable flask (equipped with a K-tube, a stirrer, and a nitrogen introducing tube) were prepared 23.7 g of dimethyl 2,6-naphthalenedicarboxylate (manufactured by Tokyo Chemical Industry Co., Ltd., first grade), 52.1 g of sodium dimethyl 5-sulfoisophthalate (manufactured by Wako Pure Chemical Industries, Ltd.), 22.4 g of ethylene glycol (manufactured by Wako Pure Chemical Industries, Ltd., special grade), 26 mg of titanium tetrabutoxide (manufactured by Tokyo Chemical Industry Co., Ltd., first grade), 117.3 g of bisphenoxyethanolfluorene (manufactured by Osaka Gas Chemicals Co., Ltd.), and 866 mg of sodium acetate (manufactured by Wako Pure Chemical Industries, Ltd., special grade). Then, the mixture was heated by a mantle heater, with the outside temperature increased from 180° C. to 260° C. over 1 hour, under stirring at normal pressure under a nitrogen atmosphere, and was stirred at that temperature for 4 hours to undergo a transesterification reac...

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Abstract

A method for manufacturing a thermoplastic resin composition enabling easy control of the weight average molecular weight of a thermoplastic resin used in a soluble three-dimensional modeling support material, the support material having sufficient strength even when used in the manufacture of a three-dimensional object by an FDM system 3D printer, being less colored with excellent appearance quality, and having a high dissolution speed in neutral water and quickly removable from a precursor of the three-dimensional object without using a strong alkaline aqueous solution; and the thermoplastic resin having dicarboxylic acid monomer units derived from a dicarboxylic acid component and having a proportion of an aromatic dicarboxylic acid monomer unit derived from a sulfonic acid group and / or sulfonate group-containing aromatic dicarboxylic acid component in the dicarboxylic acid monomer units of 10 mol % or more; the method including mixing an organic salt compound represented by formula (I):(R1—SO3−)nXn+  (I).

Description

TECHNICAL FIELD[0001]The present invention relates to a method for manufacturing a thermoplastic resin composition.BACKGROUND ART[0002]The 3D printer is one type of rapid prototyping, and it is a three-dimensional printer for modeling a three-dimensional object based on 3D data such as 3D CAD and 3D CG. Systems of 3D printing have been known, such as a fused deposition modeling system (hereinafter referred to as an FDM system), an inkjet ultraviolet curing system, a stereolithography system, and a selective laser sintering system. Among these systems, the FDM system is a modeling system of heat-melting, extruding, and laminating polymer filaments to obtain a three-dimensional object, and the FDM system does not use a reaction of the material unlike other systems. Accordingly, a 3D printer of an FDM system is small and inexpensive, and has become popular in recent years as an apparatus with less post-processing. In order to model a three-dimensional object having a more complex shape...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08G75/24C09D11/104B33Y10/00B29C64/118B29C64/40B33Y70/00
CPCC08G75/24C09D11/104B33Y10/00B29K2101/12B29C64/40B33Y70/00B29C64/118C08K5/42C08G63/189C08G63/6886C08G63/672C08G69/265C08L67/02C08L77/06B29K2081/06
Inventor SAWADA, HIROKIYOSHIMURA, TADANORITSUBOI, TOMOYAHIRAI, JOUJIONOUE, AKIHIRO
Owner KAO CORP
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